12657149 has 4 divisors (see below), whose sum is σ = 12727260. Its totient is φ = 12587040.

The previous prime is 12657131. The next prime is 12657167. The reversal of 12657149 is 94175621.

12657149 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94175621 = 73 ⋅1290077.

It is an interprime number because it is at equal distance from previous prime (12657131) and next prime (12657167).

It can be written as a sum of positive squares in 2 ways, for example, as 196249 + 12460900 = 443^2 + 3530^2 .

It is a cyclic number.

It is not a de Polignac number, because 12657149 - 2¹⁶ = 12591613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12657119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34784 + ... + 35145.

It is an arithmetic number, because the mean of its divisors is an integer number (3181815).

Almost surely, 2^12657149 is an apocalyptic number.

It is an amenable number.

12657149 is a deficient number, since it is larger than the sum of its proper divisors (70111).

12657149 is an equidigital number, since it uses as much as digits as its factorization.

12657149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70110.

The product of its digits is 15120, while the sum is 35.

The square root of 12657149 is about 3557.6887160065. The cubic root of 12657149 is about 233.0479556471.

It can be divided in two parts, 126 and 57149, that added together give a palindrome (57275).

The spelling of 12657149 in words is "twelve million, six hundred fifty-seven thousand, one hundred forty-nine".